package shangguigu_juc.lock;

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

// 资源类
class ShareResource{
    // 定义标志位
    private int flag = 1;
    // 创建Lock锁
    private Lock lock = new ReentrantLock();
    // 创建Condition对象
    private Condition c1 = lock.newCondition();
    private Condition c2 = lock.newCondition();
    private Condition c3 = lock.newCondition();
    
    public void print5(int loop) throws InterruptedException {
        lock.lock();
        try {
            while (flag != 1){
                c1.await();
            }
            for(int i=0;i<5;i++){
                System.out.println(Thread.currentThread().getName()+" :: "+i+" ：轮数："+loop);
            }
            flag = 2;
            c2.signal();
        }finally {
            lock.unlock();
        }
    }
    
    public void print10(int loop) throws InterruptedException {
        lock.lock();
        try {
            while (flag != 2){
                c2.await();
            }
            for(int i=0;i<10;i++){
                System.out.println(Thread.currentThread().getName()+" :: "+i+" ：轮数："+loop);
            }
            flag = 3;
            c3.signal();
        }finally {
            lock.unlock();
        }
    }

    public void print15(int loop) throws InterruptedException {
        lock.lock();
        try {
            while (flag != 3){
                c3.await();
            }
            for(int i=0;i<15;i++){
                System.out.println(Thread.currentThread().getName()+" :: "+i+" ：轮数："+loop);
            }
            flag = 1;
            c1.signal();
        }finally {
            lock.unlock();
        }
    }
}

// 创建多个线程，调用资源类中的操作方法
public class ThreadDemo3 {

    public static void main(String[] args) {
        ShareResource shareResource = new ShareResource();
        
        new Thread(() -> {
            for(int i=0;i<10;i++){
                try {
                    shareResource.print5(i);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }, "AA").start();

        new Thread(() -> {
            for(int i=0;i<10;i++){
                try {
                    shareResource.print10(i);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }, "BB").start();

        new Thread(() -> {
            for(int i=0;i<10;i++){
                try {
                    shareResource.print15(i);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }, "CC").start();
    }
}
